Beam-head brake for looms



Sept. 21 ,1926.

. J. CARROLL BEAM HEAD BRAKE FOR LOOMS.

Filed August 5 1924 INVENTOR 7 WITNESSES. John Carro Z6.

v ATTORNEYS. I

Patented Sept. 21, 1926.

UNETED JOHN CARROLL, or rarn'asolvyusw' JERSEY, assrsnoa 011' oneness TO nansstr I BARBER, or rarnnson, new-Jansen. I

BEAM-HEAD BRAKE FOB, LOOMS.

Application filed August 5, 1924- Serial No. 730,211.

This invention has relation to the art of weavin and has articular reference to an improvement. in a beam head brake for looms which brake constitutes the means for tensioning the warp threads.

At the present time,certain of the looms now in generaluse are provided with beamheads around which a rope is trained, .the upper end of which ropeis secured in any suitable manner and to the loweriend of .which a weight is attached, whereby the convolutions embracing the beam head serve to effect a braking action thereon to tension the warpthreads; It has been found that in actual practice, the rope convolutions which 1 embrace the beam head tendto stick at intervals so that a uniform tension is not 01-.

tained, thereby resulting in the production of cloth of uneven mesh and inferior quality. When this occurs, it becomes necessary to remove the rope from the beam head and rub the same with graphite, Frenchchalk or other suitable substances which entail considerable time, causing a shutdown of the loomand a consequent loss to both the employer and employee. Furthermore the ropes rapidly wear to such an extent as to render them unfit for use thus requiring replacements frequently, all of which combine to add to the cost of production of the cloth.

It is therefore an object of the present invention to overcome the above recited ohjections and disadvantages. by'interposiuej a contractile element or split sleeve between the beam head and the rope convolutions which embrace the same, so that re ative movement therebetween and consequent wear on the rope is reduced to an absolute minimum; so that a uniformtension is ex erted at all times on the warp threads and furthermore so that the introduction of a suitable substance between said element or sleeve and the beam head is facilitat d; and this without materially altering the loom structure. r

The invention furthermore contemplates an improved warp thread tensioning means for looms, which is comparatively simple in its construct-ion, inexpensive to produce and install and which is highly efficient and thoroughly reliable in its purpose.

With the above recited and other objects in view, the invention resides in the novel construction set forth in the following specification, particularly pointed out in the appended claims and illustratedin the accompanying drawings, it being understood that in accordance with the invention;

Fig. 2 is'a sectional view therethrough taken approximately on the line 22.-of

Fig. 1;

Fig. 3 1s a sectional view taken approxi-, mately on the line 3+3 of'Fig. 2; and

Fig. 4L. is a perspective view, of: the split sleeve or contractile element. I v I Referring to the drawings by characters of reference 10 designatesa warp beam which hassecured to its opposite ends the usual beam heads :11 which consistof a cylindrical body 12 having a closedinner end 13 which is attached in any suitable manner thereto. The outer periphery of the beam headis provided at its opposite side edges with circumferential flanges 14 to define the usual drum or spool around which the convolutious15 of the usual rope 16 are trainechthe rope 16 being attachedat its upper endxasfat 1 7 to any suitable element and having-"supported at its lower end a weight 18 whereby the weight effects a normal contraction of the con-- volutions; The improvement which constitutes the present invention consists in interposing between the: convolutions-lfi of! the rope and the periphery of the drum orcylindrical body 12 a split sleeve-19 which conforms in shape to the periphery of the body or drum 12 and which snugly fits thereabout with its opposite ends spaced apart.

Under this arrangement it will thus be seen that the splitsleeve 19 which is surrounded by the convolutions 15 of the rope has no relative movement with respect thereto and that the periphery of the beamhead moves or turns relative to the sleeve 19. This prevents wear on' the rope convolutions and increases the length of life or usefulness of the rope to an absolute maximum. It is furthermore found that thexsleeve whichis preferably of a suitable anti-frictionmetal exerts a uniform contractile braking action at all times on the beam head which tends on thewarp threads;

In order to facilitate the introduction of a toward. the production of a uniform tension suitable lubricant substance, such as graphite or the like to theconfronting inner'and outer peripheries of the sleeveand beam head, thepsaid cylindrical Wall. 12 of the beam head is -apertured as at 20. Furthermore in orderto provide means for supplying the lubricant substance automatically to said peripheries the said aperture 20 is preferably threaded to receive the threadednozzle 21' of a lubricant cup 22 which is closed at its outer end by a screw/cap which may also'serve as a means for forcing the lubricant through the nozzle upon rotation of the cap in one direction.

It is of course, to be understood-thatwhere a reliable anti-friction metal. is employed such as Monel,,th'e necessity of employing the lubricatingdevi'ce' is obviated.

' From the foregoingit will thus be: seen that an. extremely simple and, inexpensive improvement in beam head brakes hasbeen devised which serves toeffect the production'of cloth of auniform texture.

I I claim: 1. The combination With the beam head of aloom and "a; brake rope coiled-thereabout, of. a split contractile sll'eeve interposed between the convolutions of said brake rope'and beam; head and a perforated portionofsaid beamhead constituting means for' introducing alubricating substance between the outer periphery of'the beam head.

and the inner periphery of the sleeve.

2. The combination with the beam head of aloom and a brake rope coiled thereabout of a split contractile sleeve interposed between the convolutions of'sai'd brake rope and beam head and a perforated portion offsaid: beam head constituting means for introducing a lubricating substance between theouter periphery of the beam head and inner periphery of the sleeve and means communicating with said'perfo- 'ra'ted poitions for; holding a.jsuppl-y of lubricant. V 1 V v 3."The combination with the beam head of a loom and a brake rope, coiled thereabout of a split. contractile sleve inter posed between the convolutions of: said brake rope and beam head and a perforated portion, of said vbeam "headl constituting means for introducing a lubricating suba compassing? cylindrical surface, means to resist rotation of the beam including a taut-- one-d fleXlblQ element constricting the part of thebeam having such surface; and a band of sheet material interposed between the "be-am and-the constricting portion of said element and having an lnner hard smooth cylindrical surface conforming. and 5111, con.-v

tact Will] said surface of the bean.

0.. A 1et-off mechanism for looms, including, with the Warp-beam havinga hard encompassing braking surface, means to resist rotation of the beam including; a. t-autenedl flexible element constricting the part of th beam *liaving such surface; and a band of sheet material.interposed between the beam 7 and the constrictingportion of Said element and having an outer hard-smooth c-ylinQ- drical surface receivingthe contact of said portion. r

6. A let-off mechanism for looms includ' ing, with the Warp-beam having av hard encompassing cylindrical surface, means to resist rotation of the beam including a tautened' flexible element constricting the part of the beam having such surface and a band of sheet material interposed between the beam andthe constricting portion of said element and having an innerzha-rdcylindrical surface conforming and in cont'a-ct with said surface of the beam and anouter hard smooth cylindrical surface receiving the contact of said portion.

. JOHN CARROLL. 

